Ghost-text prompt suggestions need an inline Tab hint — users don't know how to accept them

Problem

The composer in the Claude Code desktop app sometimes shows a grayed ghost-text suggestion for the next prompt. There is no visible affordance telling the user how to accept it.

What actually happened to me (non-technical user flow):

1. I saw what looked like pre-filled text in the input box.
2. I pressed Enter to send it — nothing happened (the input is actually empty).
3. I had no idea the text was a suggestion, nor that Tab would accept it. I only learned this after asking the AI itself.

Suggestion

Append a small keycap badge at the end of the ghost text, e.g.:

把这个 schedule 块方案也记进待办,编号 DES-003   ⇥ Tab

This is the established pattern in IDE inline completions (VS Code/JetBrains ghost text shows accept hints). Alternatives: show the badge only for the first N encounters, or a one-time tooltip.

Environment

• Claude Code desktop app (macOS), 2026-07
• Composer ghost-text suggestion feature (both history-based and predicted suggestions)

Small change, big discoverability win — this feature is currently invisible-by-design for anyone who doesn't already know Tab-to-accept.